Bolle STKS 420 Glasses - Crystal/Cobalt Flash Polarized

Glasses designed with users in mind who work in challenging field conditions, where both effective eye protection and wearing comfort are important. Thanks to a sturdy construction and the use of high-quality polarised lenses with a CAT.3 filter, they effectively protect eyes from intense sunlight, reducing glare and improving contrast of vision.

The model provides protection against fragments, ricochets, and other incoming objects in accordance with class F (objects weighing 0.86 g moving at a speed of 45 m/s).

Lenses in Cobalt Flash colour and 2.2 mm thickness are made of polycarbonate, which combines light weight with high resistance to mechanical damage. Their surface features an Anti-Scratch coating, increasing scratch resistance. Thanks to this, glasses maintain their properties longer, even with intensive use.

Thanks to the use of polarisation, the lenses reduce glare, significantly improving image readability. Additionally, they increase contrast and colour saturation, reducing eye fatigue during prolonged use in strong light.

The model is equipped with a full full frame made of recycled polycarbonate. Modern production processes have resulted in a construction that combines light weight with adequate rigidity and resistance to mechanical damage.

Side shields protect the eyes from particles, dust, and other contaminants, increasing the protection level in a demanding environment. Shaped temples provide stable and comfortable fitting of the glasses to the face, reducing the risk of them shifting during movement and increasing wearing comfort.

• EN 166 - a European standard concerning optical requirements and mechanical protection for glasses and goggles. Optical requirements include light transmission and diffusion, refractive properties, resistance to heat and UV radiation, corrosion, and ignition. Mechanical protection is resistance to impacts from objects, with four levels marked by letters: S, F, B, and A, where S is the lowest level of protection, and A is the highest.
• EN172 - a standard defining the markings and transmittance coefficients, as well as appropriate testing methods for sun protection filters against sun glare.
• CE - a marking indicating that the product meets the requirements of EU norms and regulations regarding safety, health, and environmental protection. The CE marking indicates that the manufacturer confirms product compliance with the EU standards and directives.

• lenses made of durable and lightweight polycarbonate
• Anti-Scratch coating on visors
• full frame made of recycled polycarbonate
• light yet durable construction
• class F mechanical resistance
• ergonomically shaped temples
• side shields
• polarisation